The nitrogen cycle

By |2022-09-15T12:40:20+02:00January 24th, 2023|Notes, O Level Science Notes, Ordinary Level Notes|

Nitrogen fixing roots in legumes. Image credit MediaWiki Nitrogen fixing roots in legumes. Image credit MediaWiki ZIMSEC O Level Combined Science Notes: The nitrogen cycle

  • Nitrogen makes up 79% of the atmosphere
  • Animals cannot absorb Nitrogen as a gas
  • They absorb it indirectly usually as part of food
  • Recycling of nitrogen is carried out […]